Retrospective Study
Copyright ©2014 Baishideng Publishing Group Inc.
World J Radiol. Aug 28, 2014; 6(8): 619-624
Published online Aug 28, 2014. doi: 10.4329/wjr.v6.i8.619
Table 3 Circle of Willis anatomy and the balloon test occlusion outcome
COW anatomyBTO-positive (%)BTO-negative (%)Total (%)
Poorly-Type 02 (5)0 (0)2 (5)
developedType 13 (7)3 (7)6 (14)
Well-Type 20 (0)4 (10)4 (10)
developedType 30 (0)30 (71)30 (71)
Total5 (12)37 (88)42 (100)